apothems
/ˈæp.ə.θɛmz/
noun
- In geometry, a line from the center of a regular polygon perpendicular to one of its sides.
- Each apothem of a regular octagon has the same length because all sides are equal.
- The teacher drew the apothem from the center of the pentagon to the midpoint of one side.
- To find the area of a regular hexagon, you multiply the perimeter by the apothem and then divide by two.